- Obituary (1724 Hits)
- Obscurity (2794 Hits)
- Officium Triste (1326 Hits)
- Omission (1216 Hits)
- Omnium Gatherum (121 Hits)
- Onheil (812 Hits)
- Onkel Tom Angelripper (880 Hits)
- Onslaught (1515 Hits)
- Oppressus (1488 Hits)
- Orae (1343 Hits)
- Orden Ogan (1293 Hits)
- Out For Blood (898 Hits)
- Outrage (JPN) (392 Hits)
- Overkill (1215 Hits)
- Ozzy Osbourne (1382 Hits)